Improvement in pyrogenetic manufacture of gasoline



1 l5 receptacle under like pressure, and leaving Patented Sept. 7, 1925.

UNITED STATES PATENT oFF cs IIBANCIS 1. ROGERS AND MAX G. PAULUS, OF WRITING, INDIANA, ASSIGNORS '10 STANDARD OIL COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF INDIANA.

IMPROVEMENT IN PYBOGENETIC MANUFACTURE OF GASOLINE.

No Drawinfi. Application filed July 21, 1919. Serial No. 812,400.

it has been deemed unnecessary to illustrate any specific apparatus, that portion of the apparatus which is used in the distillation being of well known form, and the portion used in our method of gas separation being of very rudimentary form.

\Ve claim: I

1. The herein described improvement con sisting in conducting pyrogeneticdistillation of a hydrocarbon oil of relatively high boiling point, condensing the gasoline containing distillate in acondenser in communication with the still and under still pressure, mitting the gas dissolved in the distillate to pass out of the distillate while under pressure, and releasing the gas upon such separation with a gradual reduction of pressure.

2. The herein described improvement consisting in conducting the pyrogenctic distillation of high boiling point hydrocar- In the manufacture of gasoline by pyrogenesis where the gasoline is distilled and condensed,- under pressure, as for example in accordance with the process of Patent 5 1119700, it has heretofore been the practice to take the gasoline from the receiving drum from which it emerges under pressure and with a considerable quantity of gas dissolved in it, and flow the gasoline into a ll) receptacle at atmospheric pressure wherein the dissolved gas bubble out. 7

We have discovered that a considerable economy can be effected by conducting the gasoline while still under pressure into a within that receptacle a vapor or gas filled space above the liquid body. The pressure is then reduced byopening a valve in -the upper part of the receptacle permitting the escape of as therefrom so that the gas is separated rom the liqcpid while still under pressure andis allowe to escape only after such separation. In this way the bulk of the gas leaves the receptacle at high pres- 2 sure, and it is only at the very end of the gas release that any gas at a pressure approximating that of the atmosphere leaves the surface of the liquid.

The process may be practiced in apparatus of any form, all that is required being a tank into which a charge of the liquid may be introduced and a gas escape valve in the upper part thereof. For this reason light gasoline containing distillate formed also under pressure whereby the distillate contains gas in solution, separating the liquid under pressure, providing a vapor space thereabove and gradually releasing the gas from said vapor space, thereby gradually reducing said pressure.

FRANCIS M. ROGERS. MAX G. PAULUS,

isolating the liquid distillate, per-.

bon oil under pressure and condensing the 

